Найдите корни уравнений 1.(x-16)*5=4202.(16+x)*20=6803.(200-x)*6=11404.(x+30)*110=7700

1.(x-16)*5=420 5x - 80 = 420 5x = 420 + 80 5x = 500 x = 500 : 5 x = 100 2.(16+x)*20=680 320 + 20x = 680 20 x = 680 - 320 20 x = 360 x = 360 : 20 x = 18 3.(200-x)*6=1140 1200 -6x = 1140 -6x = 1140 - 1200 -6x = - 60 x = 10 4.(x+30)*110=7700 110x + 3300 = 7700 110x = 7700-3300 110x = 4400 x = 40